Animation Nodes Offset Matrix
Welcome to Blender Stackexchange! In the old node, the End option simply inverted the Falloff. So to have the same effect, you can invert the Falloff before inputting it using the Invert Falloff Node. This is described in the documentation of the node:


  Start option will offset the matrices based on the offset parameters with the falloff as a factor. End option will offset the matrices based on the offset parameters with the inverse falloff as a factor, in other words, all matrices will be transformed based on the offset parameters and then matrices will be transformed back to their initial position based on the offset parameter with the falloff as a factor.